CN105827299B - System and method for Radio frequency relay - Google Patents
System and method for Radio frequency relay Download PDFInfo
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- CN105827299B CN105827299B CN201610309495.5A CN201610309495A CN105827299B CN 105827299 B CN105827299 B CN 105827299B CN 201610309495 A CN201610309495 A CN 201610309495A CN 105827299 B CN105827299 B CN 105827299B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
In one embodiment, a method of for repeater frame, the first frame from the first called station is received including repeater, wherein the first frame has first containing the first indicator；And determine whether that the first frame will be relayed according to first indicator.The method also includes when determining the relaying first frame, the repeater sends the first frame to access point.
Description
It is entitled " in the wireless network using the system of RF repeater the present invention claims what is submitted on May 4th, 2012
And method " the 61/642nd, No. 912 United States provisional application earlier application priority and on April 29th, 2013 submit
The earlier application of No. 13/872,622 U.S. patent application case of entitled " system and method for Radio frequency relay "
Priority, the content of these earlier applications are hereby incorporated herein by this, as reproducing full text.
Technical field
The present invention relates to system for wireless communication and method, the more particularly, to system and method for Radio frequency relay.
Background technique
The networks such as the WLAN (WLAN) based on 802.11 technology of Institute of Electrical and Electronics Engineers (IEEE) be compared with
Universal network.IEEE802.11 race includes a series of aerial modulation technique of half-duplexs using same basic agreement.
Frame in IEEE802.11 includes physical layer (PHY) head and media access control (MAC) head.
PHY layer is lowermost layer.In a wlan, PHY layer is interacted with MAC layer.In addition, PHY layer also executes data encoding, hair
It send, receive the decode.
MAC layer serves as the interface between PHY layer and logic link control (LLC) layer.MAC layer is simulated entirely in multidrop network
Duplexing logic communication channel.
Network protocol is coexisted in multidrop network for LLC layer offer and what can be transmitted by consolidated network medium answers
Use mechanism.LLC layer is interacted with MAC layer and network layer.
Summary of the invention
A kind of embodiment method for repeater frame includes that repeater receives the first frame from the first called station, wherein institute
Stating first frame has first for containing the first indicator；And determine whether that described first will be relayed according to first indicator
Frame.The method also includes when determining the relaying first frame, the repeater sends the first frame to access point.
A kind of embodiment method for communicating in the wireless network includes determining whether called station is power constrained devices
And the indicator in frame head is set according to whether the called station is power constrained devices.The method also includes described logical
Believe that platform sends the frame to access point.
A kind of embodiment method of assigned repeaters includes that access point receives more than first from more than second a called stations
Message, wherein a message more than described first indicates whether more than second a called station supports repeater function；According to described
A message determines the subset of a called station more than described second more than one, wherein the communication of the subset of a called station more than described second
Platform supports repeater function.The method also includes selecting the first called station of the subset of more than second a called station to refer to
It is set to repeater and described access point and sends first called station for the first assigned repeaters claim frame, described first refers to
Determine repeater claim frame and indicates that first called station is the repeater.
Embodiment repeater includes processor and computer readable storage medium, the computer-readable recording medium storage
The program executed by the processor.Described program includes to give an order: from called station receiving frame, wherein the frame has containing finger
Show the head of symbol；Determined whether that the frame will be relayed according to the indicator.Described program further includes when determination will relay the frame
When the instruction of the frame is sent to access point.
The feature of the embodiment of the present invention is rather broadly outlined above, it is therefore an objective to allow people to be better understood when hereafter right
Detailed description of the invention.The additional features and advantage of the embodiment of the present invention are described below, form power of the invention
The subject matter of sharp claim.It will be understood by one of ordinary skill in the art that disclosed concept and specific embodiment can be used easily
It makes an amendment or designed for realizing the other structures of identical purpose of the invention or the basis of process.Those skilled in the art
It should be further appreciated that such equivalent constructions do not depart from the spirit and scope of the present invention proposed in the appended claims.
Detailed description of the invention
For a more complete understanding of the present invention and its advantage, referring now to the description carried out below in conjunction with attached drawing, in which:
Fig. 1 shows the embodiment system for radio frequency (RF) relaying；
Fig. 2 shows the signaling fields containing device type indicator；
Fig. 3 shows the embodiment RF repeater based on physical layer (PHY)；
Fig. 4 shows the embodiment RF repeater based on PHY and media access control (MAC) layer；
Fig. 5 shows the embodiment method of repeater frame；
Fig. 6 shows the embodiment method of transmission frame；
Fig. 7 shows the embodiment method of specified RF repeater；
Fig. 8 shows another embodiment method of specified RF repeater；And
Fig. 9 shows the block diagram of the embodiment of general-purpose computing system.
Unless otherwise directed, otherwise the correspondence label in different figures and symbol generally refer to corresponding part.Drawing each figure is
In order to clearly demonstrate the related fields of embodiment, therefore be not necessarily drawn to scale.
Specific embodiment
Although can be used any initially it should be understood that the illustrative embodiment of one or more embodiments is provided below
The currently known or existing technology of number implements disclosed system and or method.The present invention should in no way be limited to hereafter institute
The illustrative embodiment, schema and the technology illustrated, includes exemplary design illustrated and described herein and embodiment party
Case, but can be modified in the scope of the appended claims and the full breadth of its equipollent.
Wlan network based on IEEE802.11 can be used as sensor and load transfer equipment.The sensing such as intelligent electric meter information
Device information can be used for controlling the center in smart grid application.Sensor can be battery powered and be deployed in compared with distant positions.Therefore,
Sensor battery may decay at any time.When sensor battery decaying, the transmission of sensor may die down.Load transfer equipment
It can also be battery powered.However, due to load transfer equipment generally do not dispose far, their battery be easy to charge or more
It changes.Repeater or transponder can be used for further being sent to the frame from power constrained devices (for example, low power sensor)
Its destination.The coverage of power constrained devices can be increased by carrying out relaying using repeater.
Fig. 1 shows the system for being relayed using radio frequency (RF) repeater to the frame from power constrained devices
100.System 100 includes basic service set (BSS) 102.BSS102 includes access point 104, which is coupled to communication
Platform.The called station includes sensor 105, sensor 106 and load transfer equipment 108.Sensor 105 and sensor 106 can
To be intelligent electric meter, temperature sensor and pressure sensor, and load transfer equipment 108 can be smart phone, tablet computer,
Laptop or other equipment.The possible size of sensor is smaller and disposes farther out.In addition, sensor can measure and upload number
According to, and load transfer equipment and can receive streaming audio or video, Email, network, send and receive voice, downloading or progress
Game uses service or downloading mass data.More or less called stations, sensor and load transfer equipment can be used.In addition
There can also be other kinds of called station.
BSS102 further includes repeater 110, which is RF repeater.In an example, repeater 110 is
Called station, such as load transfer equipment.In another example, repeater 110 is special equipment.In an example, repeater
110 be load transfer equipment.A repeater is presented only in figure, but more multi-repeater may be present.Repeater 110, which is coupled to, to be connect
Access point 104 and some sensors 106, these sensors 106 can be power constrained devices.In addition, repeater 110 has enough
Power send frames to access point 104.In this example, repeater function is separately disposed.In another example, repeater function
It is included in called station as functional block.Repeater 110 enhances the signal power from sensor 106 so that signal can arrive at
Access point 104.There is enough power to send signal to access point 104 for sensor 105 and load transfer equipment 108.Relaying
It is power constrained devices which device 110, which distinguishes, which is not power constrained devices.Then, repeater 110 is to from power limited
The frame of equipment is relayed, but is not relayed to the frame from non-power constrained devices.Sensor power may be limited.Because
The possible size of sensor is smaller and disposes farther out, and battery can decay at any time and may not be able to charge or replace.With sensing
Device cell decay, sensor, which is sent, may not have the enough power for arriving at access point 104.
Repeater 110 distinguishes the frame relayed from the needs of power constrained devices.In an example, frame is used
PHY are distinguished power constrained devices and non-power constrained devices at physical layer (PHY).Repeater design is simplified using PHY layer
And it avoids and implements complicated relay function.
In a wlan, SIGNAL (SIG) field is included in PHY lead code by PHY data unit (PDU).Fig. 2 shows
SIGNAL field 115 indicates and currently transmitted relevant controlling feature.SIGNAL field 115 includes device type bit, is adjusted
Encoding scheme (MCS) bit processed, bandwidth (BW) bit send length bits and reservation bit.In an example, SIGNAL word
Section 115 in individual bit, be labeled as device type, indicating equipment whether power limited.In another example, the individual bit
Labeled as forward_ind or discharge pattern bit or other instruction frames whether come from power constrained devices and whether require into
The name that one step is sent.In an example, device type bit is that " 1 " indicates frame in power constrained devices and needs
After, and device type bit is that " 0 " indicates frame from non-power constrained devices and without further sending.In another example,
Device type bit is that " 0 " indicates frame from power constrained devices and needs to relay, and device type bit is that " 1 " indicates frame
From non-power constrained devices.Device type bit can indicate the flow or the transmission that are originated from sensor node or load transfer equipment,
Wherein sensor is power constrained devices and loads transfer equipment not to be power constrained devices.Alternatively, device type bit can refer to
Show that frame is from the low called station of power or from the called station with enough power.During device type bit indication frame needs
After device forwarding or frame without further forwarding and in receiving node termination.In an additional embodiment, more than one bit is for referring to
Show whether device type or called station are power constrained devices.For example, two or more device types can be distinguished with multiple bits.
In an example, power constrained devices indicator signal is detected by PHY layer completely.Only use PHY layer quickly side
Just.Fig. 3 shows the repeater 132 for being coupled to access point 104.Repeater 132 is for only utilizing PHY layer, not utilizing higher
The scheme of (for example, MAC layer).Repeater 132 includes two antennas, receives (RX) antenna 122, receives the letter from called station
Number, and transmitting (TX) antenna 130, relay the signals to access point 104.Since self-interference may be problem, transmitting antenna 130
It can be directed to access point 104 and the directional aerial far from receiving antenna 122.The received bit of receiving antenna 122 is placed in reception
In buffer area 124.When reading out bit from reception buffer area 124, these bits are amplified the amplification of device 126, are subsequently placed at
Emit in buffer area 128.Finally, the bit for coming spontaneous emission buffer area 128 is relayed to access point 104 by transmitting antenna 130.
In another example, PHY and MAC layer function are all used for repeater.Not only it had used PHY layer but also had used MAC layer may
Lead to time delay, but also will push and be received and transmitted using single antenna.Mainly MAC layer is at least used using PHY layer.Figure
4 show in PHY layer and the functional repeater 140 of MAC layer tool.Repeater 140 only includes an antenna, i.e. transceiver 146,
Its execution sends and receivees function.Initially, frame or transmission are received by transceiver 146, are placed in and are received in buffer area 148.In addition to
Traditional WLAN PHY function, received PDU are detected in PHY layer 142 by device type module 150.When device type ratio
When refering in particular to show frame from power constrained devices, amplifier 152 amplifies bit, constructs MAC data unit by removing PHY
(MDU), it and by bit is placed in the trunk queue 154 of MAC layer 144.In general, without being further processed.Then will in
After in the transmitting buffer area 158 that the bit in queue 154 is placed in PHY layer 142.Emit the bit in buffer area 158 by transceiver
146 are relayed to access point 104.When device type bit indication frame is from non-power limiting communication platform, detects and receive
The MAC Address of frame.If the address of MAC Address matched repeaters 140, MDU is constructed from the PDU received, and bit is set
To extra process in the MAC queue 156 of MAC layer 144.When the address of MAC Address and repeater 140 mismatches, abandon
PDU.In an example, trunk queue 154 and MAC queue 156 are the different logics implemented in same physical buffer space
Queue.In another example, trunk queue 154 and MAC queue 156 are implemented in different physical buffer spaces.
Fig. 5 shows the flow chart 160 of the method for 110 repeater frame of repeater.Initially, it at step 162, is connect from called station
Receive frame.
Then, at step 166, repeater 110 decides whether to relay the frame.Repeater 110 can decide whether that relaying should
Frame.When frame comes from power constrained devices, repeater 110 can determine to relay the frame in step 168；When frame is limited from non-power
When equipment, repeater 110 can determine not handling the frame in step 170.In an example, when frame comes from sensor, frame comes
From power constrained devices, and when frame carrys out self-supported transfer equipment, frame is not from power constrained devices.In another example,
When frame is from the low sensor of power, frame comes from power constrained devices, and when frame is from the not low called station of power or load
When transfer equipment, frame is not from power constrained devices.In additional example, the decision about repeater frame is based on the power of frame.
Repeater 110 detects the power of the frame received.When the power of the frame received is lower than threshold value, repeater 110 is determined in step
The frame is relayed at rapid 168.On the other hand, when the power of the frame received is greater than or equal to threshold value, repeater 110 is determined in step
The frame is abandoned at rapid 170.
When repeater 110 determines to relay the frame, which is relayed to access point 104 at step 168.Repeater 110
Determine the mechanism of repeater frame.The frame that need to be relayed is stored in it and emitted in buffer area by repeater 110.Then, when frame arrives at queue
When foremost, the frame of storage is sent access point 104 by repeater 110.When the decision of repeater 110 does not relay the frame, the frame
It is further processed at step 170 without any.
Fig. 6 shows the flow chart 180 that called station sends the method for frame.Initially, at step 182, called station determines it
It whether is power constrained devices.For example, it is power constrained devices when called station is sensor；And when called station is load
When transfer equipment, it is not power constrained devices.In another example, when the power of battery of called station be lower than power threshold, or
For person when the power of the signal of transmission is lower than signal threshold value, it is power constrained devices.Be equal to when the power of battery of called station or
Higher than power threshold, or when the power of the signal of transmission is equal to or higher than signal threshold value, it is not power constrained devices.
Then, at step 184, called station is based on whether called station is middle instruction in power constrained devices setting frame head
Symbol.Head can be PHY layer head or MAC layer head.In this example, indicator is device type bit, individual bit.In an example
In, when called station is power constrained devices, device type bit is set as " 1 "；When called station is not power constrained devices,
Device type bit is set as " 0 ".In another example, when called station is power constrained devices, the setting of device type bit
For " 0 "；When called station is not power constrained devices, device type bit is set as " 1 ".Alternatively, more than one bit can be used
Indicate whether called station is power constrained devices.
Finally, sending frame at step 186.Frame can be sent directly to access point 104.Alternatively, repeater 110 can will be in frame
After arrive access point 104.
Fig. 7 shows the flow chart 190 of the method for 104 assigned repeaters of access point.Initially, at step 192, access point
104 receive the message from called station.These message can indicate whether called station has the ability for supporting repeater function.These
Message, which may also include access point 104, will use using specified one or more called stations as the additional information of repeater.It can communicate
The association of platform executes step 192 again during association.It can be by by capability bit for the instruction of the ability as repeater
Increase to message elements or information field (for example, capable field) Lai Shixian.
Then, at step 194, access point 104 determines which called station supports repeater function.For example, this can be based on
The indicator of repeater function is supported to carry out about called station.
Next, access point 104 specifies one or is repeater to multiple called stations at step 196.In an example
In, only select a called station.In another example, multiple called stations are selected.It may be selected with repeater function and have most
High-power equipment.Alternatively, selection is located at the equipment for needing the sensor proximity relayed.
At step 198, access point 104 sends assigned repeaters claim frame (one or more) to and is appointed as repeater
Called station (one or more).The frame is alternatively referred to as repeater _ notification frame.Table 1 shown below shows action management frame
In repeater specify claim frame format example.Sequentially 1 includes classification, and sequence 2 includes movement, such as repeater is specified and asked
Seek field.Repeater specifies whether request field instruction called station is appointed as repeater.In addition, sequence 3 contains assigned repeaters
(ID) field is identified, and sequence 4 includes other fields.The example of assigned repeaters id field includes MAC Address or association identification
It accords with (AID).
| I. sequence | II. information |
| III.1 | IV. classification |
| V.2 | VI. movement (the specified request of repeater) |
| VII.3 | VIII. assigned repeaters ID |
| IX.4 | X. other fields |
Table 1
At step 200, access point 104 receives assigned repeaters response frame, access point from called station (one or more)
104 send the called station for assigned repeaters claim frame at step 198.Table 2 shows assigned repeaters response
The example of frame.Classification is sequence 1, and acting (for example, repeater specified response) is sequence 2.The instruction of repeater specified response frame
Called station confirms its state as assigned repeaters.In addition, sequence 3 is assigned repeaters ID.Sequentially 4 be state.In example
In, state is individual bit.In an example, when called station is designated as repeater, mode field is set as " 1 "；When
When called station is not designated as repeater, mode field is set as " 0 ".In another example, when called station is designated as relaying
When device, mode field is set as " 0 "；When called station is not designated as repeater, mode field is set as " 1 ".Sequentially 5 be it
His field.
| I. sequence | II. information |
| III.1 | IV. classification |
| V.2 | VI. (repeater specified response) is acted |
| VII.3 | VIII. assigned repeaters ID |
| IX.4 | X. state |
| XI.5 | XII. other fields |
Table 2
Fig. 8 shows the flow chart 210 that called station is designated as the method for repeater.Initially, at step 212, communication
Platform sends a message to access point 104.The message can be sent during being associated with access point 104 or being associated with again.Message instruction
Whether called station supports repeater function.In this example, sensor does not support repeater function, and loads in transfer equipment support
After device function.In another example, sensor and some load transfer equipments do not support repeater function, and other loads are shifted
Equipment supports repeater function.The relay function of equipment may be available in load transfer equipment.It can be according to network planning ability
Enable and disable relay function.Repeater capability instruction can be by increasing to message elements or information field (example for capability bit
Such as, capable field) Lai Shixian.
Then, at step 214, called station receives the assigned repeaters claim frame from access point 104.Assigned repeaters
Whether claim frame instruction called station is designated as repeater.Upper table 1 shows the example of assigned repeaters claim frame.Specified relaying
Device claim frame includes classification, assigned repeaters claim frame, assigned repeaters id field and other fields.
Finally, called station sends assigned repeaters response frame, the assigned repeaters response frame instruction at step 216
Called station confirms its state as assigned repeaters.The example of assigned repeaters response frame indicates in upper table 2.Specified relaying
Device response frame includes classification, repeater specified response field, assigned repeaters ID, state and other fields.
Fig. 9 shows the block diagram of processing system 270, can be used for realizing devices disclosed herein and method.Particular device
All components shown in can use, or the only subset of component, and integrated horizontal can be different with equipment.In addition, equipment may include
Multiple examples, such as multiple processing units, processor, memory, transmitter, receiver of component etc..Processing system can wrap
Include the processing unit for being equipped with one or more input equipments (such as microphone, mouse, touch screen, keypad, keyboard).In addition,
Processing system 270 can be equipped with one or more output equipments, for example, loudspeaker, printer, display etc..Processing unit can be with
Including central processing unit (CPU) 274, memory 276, mass storage facility 278, video adapter 280 and it is connected to
The I/O interface 288 of bus.
Bus can be one or more of any kind of several bus architectures, including storage bus or storage control
Device processed, peripheral bus, video bus etc..CPU274 may include any type of data into electronic data processing.Memory 276 may include
Any kind of system storage, for example, it is static random access memory (SRAM), dynamic random access memory (DRAM), same
Walk DRAM (SDRAM), read-only memory (ROM) or combinations thereof etc..In embodiment, memory may include the use in booting
ROM and the DRAM of program and data storage that uses of while executing program.
Mass storage facility 278 may include appointing an any type of memory devices, for storing data, program
And other information, and make these data, program and other information that can pass through bus access.Mass storage facility 278 can be with
Including one of following item or a variety of: solid magnetic disc, hard disk drive, disc driver, CD drive etc..
Video adapter 280 and I/O interface 288 provide interface with coupled external input-output equipment to processing unit.Such as
Shown in figure, the example of input-output equipment includes the display for being coupled to video adapter and the mouse/key for being coupled to I/O interface
Disk/printer.Other equipment may be coupled to processing unit, and can use additional or less interface card.For example, can
Serial line interface is supplied to printer using serial interface card (not shown).
Processing unit further includes one or more network interfaces 284, may include the wire links such as Ethernet cable and/or
The Radio Link of access node or heterogeneous networks.Network interface 284 allows processing unit to pass through network and remote unit communication.Example
Such as, network interface can be provided wireless by one or more transmitter/transmitting antennas and one or more receiver/receiving antennas
Communication.In embodiment, processing unit be coupled to local area network or wide area network for data processing and with remote equipment (for example, its
His processing unit, internet, long-range storage facility etc.) it communicates.
Although several embodiments have been provided in the present invention, it should be appreciated that in the feelings for not departing from the spirit or scope of the present invention
Under condition, system and method disclosed in this invention can be embodied with many other particular forms.Example of the invention should be regarded
To be illustrative and not restrictive, and the present invention is not limited to the details given by Ben Wenben.For example, various elements or component can
It can be omitted or do not implement with the combination in another system or merging or certain features.
In addition, without departing from the scope of the invention, description and explanation is discrete or independent in various embodiments
Technology, system, subsystem and method can be combined or merge with other systems, module, techniques or methods.It shows or discusses
Power mode, mechanical system or other modes can also be adopted and pass through certain for discussed as coupled or directly coupled or communication other by stating
One interface, equipment or intermediate member are coupled or are communicated indirectly.Other variations, substitution and the example changed can be by this fields
Technical staff determines in the case where not departing from spirit herein and disclosed range.
Claims (10)
1. the method that one kind communicates in the wireless network, which is characterized in that the described method includes:
Determine whether called station is power constrained devices；
The indicator in frame head is set according to whether the called station is power constrained devices, and the indicator is also used to refer to
Show whether the called station needs to relay；
The called station sends the frame；
Wherein, whether described according to the called station is that power constrained devices include: come the indicator being arranged in frame head
When the called station is power constrained devices, the first value is set by the indicator, described in the first value instruction
Called station needs to relay；Or
When the called station is not power constrained devices, second value is set by the indicator, the second value indicates institute
Called station is stated not need to relay.
2. the method according to claim 1, wherein the head is physical layer (PHY) head.
3. the method according to claim 1, wherein the head is media access control (MAC) head.
4. the method according to claim 1, wherein the indicator is individual bit.
5. the method according to claim 1, wherein the indicator more than one bit.
6. the method according to claim 1, wherein when the called station is sensor, the called station is
Power constrained devices；When the called station is load transfer equipment, the called station is not power constrained devices.
7. the method according to claim 1, wherein the signal strength when the called station is lower than first threshold
When, the called station is power constrained devices；And
When the signal strength of the called station is greater than or equal to the first threshold, the called station is not power limited
Equipment.
8. a kind of called station characterized by comprising
Processor；And
Computer-readable storage medium, the computer-readable storage medium stores the program executed by the processor, described
Program includes the instruction that can be proceeded as follows:
Determine whether called station is power constrained devices；
The indicator in frame head is set according to whether the called station is power constrained devices, and the indicator is also used to refer to
Show whether the called station needs to relay；
The called station sends the frame；
Wherein, described program includes carrying out the instruction of following concrete operations:
When the called station is power constrained devices, the first value is set by the indicator, described in the first value instruction
Called station needs to relay；And
When the called station is not power constrained devices, second value is set by the indicator, the second value indicates institute
Called station is stated not need to relay.
9. called station according to claim 8, which is characterized in that the head is that physical layer (PHY) head either media connect
Enter control (MAC) head.
10. called station according to claim 8, which is characterized in that when the called station is sensor, the called station
It is power constrained devices；When the called station is load transfer equipment, the called station is not power constrained devices.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201261642912P | 2012-05-04 | 2012-05-04 | |
| US61/642,912 | 2012-05-04 | ||
| US13/872,622 | 2013-04-29 | ||
| US13/872,622 US9148213B2 (en) | 2012-05-04 | 2013-04-29 | System and method for radio frequency repeating |
| CN201380005342.6A CN104040902B (en) | 2012-05-04 | 2013-05-06 | System and method for radio frequency relay |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380005342.6A Division CN104040902B (en) | 2012-05-04 | 2013-05-06 | System and method for radio frequency relay |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105827299A CN105827299A (en) | 2016-08-03 |
| CN105827299B true CN105827299B (en) | 2019-05-07 |
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| US9148213B2 (en) | 2012-05-04 | 2015-09-29 | Futurewei Technologies, Inc. | System and method for radio frequency repeating |
| JP6554798B2 (en) * | 2015-01-28 | 2019-08-07 | 富士通株式会社 | Wireless communication system |
| US10764811B2 (en) | 2016-05-27 | 2020-09-01 | Huawei Technologies Co., Ltd. | Method for handover to relay node, related device, and system |
| US11082156B2 (en) | 2018-10-30 | 2021-08-03 | Nxp Usa, Inc. | Method and apparatus for generating a physical layer (PHY) data unit for hybrid automatic repeat request (HARQ) |
| KR102537332B1 (en) | 2019-03-29 | 2023-05-30 | 한국전자통신연구원 | Method for relaying message in low power wide area network and apparatus for the same |
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Also Published As
| Publication number | Publication date |
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| KR20150005693A (en) | 2015-01-14 |
| US9148213B2 (en) | 2015-09-29 |
| RU2014148804A (en) | 2016-06-27 |
| US10547371B2 (en) | 2020-01-28 |
| CN104040902B (en) | 2016-08-24 |
| US20150358069A1 (en) | 2015-12-10 |
| RU2592642C2 (en) | 2016-07-27 |
| KR101581419B1 (en) | 2016-01-11 |
| CN105827299A (en) | 2016-08-03 |
| CN104040902A (en) | 2014-09-10 |
| US20130294328A1 (en) | 2013-11-07 |
| WO2013163962A1 (en) | 2013-11-07 |
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